CN104032346A - Efficient aluminum alloy profile oxidation device and aluminum alloy profile polishing process - Google Patents
Efficient aluminum alloy profile oxidation device and aluminum alloy profile polishing process Download PDFInfo
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Abstract
The invention relates to an efficient aluminum alloy profile oxidation device and an aluminum alloy profile polishing process. The oxidation device comprises an electrolysis tank body, cathode conducting devices, anode conducting devices and an electrolyte preparation tank, wherein notches are evenly formed on the tank edge end surface of the electrolysis tank body; the cathode conducting devices are clamped with the electrolysis tank body through the notches; the baseplate section of the electrolysis tank body is concave; a drain pipe leaded to the electrolyte preparation tank is vertically arranged in the center position of the concave; the anode conducting devices are pairwise arranged, are respectively fixed on the two opposite inner walls of the electrolysis tank body, and are two-section type bent structures connected through bolts; the bottom of the electrolyte preparation tank is an inclined structure; and a waste liquid outlet and a pump body leaded to the electrolysis tank body are arranged in the lowest position of the bottom of the electrolyte preparation tank. The anode oxidation device and the polishing process suitable for piping aluminum alloy profiles have excellent conductivity, can enhance the surface quality consistency of the piping aluminum alloy profiles, reduce the waste of raw materials, improve the electrolyte utilization rate, and are suitable for large-scale promotion and application.
Description
Technical field
The present invention relates to piping aluminium alloy extrusions processing technique field, particularly a kind of high-efficient aluminium alloy section bar oxidation unit and aluminium alloy extrusions frosting technology.
Background technology
Modern society's decoration mainly adopts aluminium alloy section structure material with door and window or curtain wall, this section bar be mainly that the single and long-term exposure of outward appearance is held corrosion-prone shortcoming in air, the existence of this shortcoming makes it more and more be difficult to meet Contemporary young user for the individual demand of decorating with structured material.For optimize aluminium alloy extrusions decorative effect, strengthen its erosion resistance and increase the service life, aluminium alloy extrusions generally all will carry out surface treatment.The surface treatment of aluminium alloy extrusions is the perfect crowded body of aluminium alloy extrusions and turns round in the magnificent of modern society, the method of conventional aluminium alloy section surface processing is anonizing, can form dense oxidation film at aluminium alloy section surface by anonizing, the existence of this oxide film can significantly improve erosion resistance, wear resistance and the decorate properties of aluminium alloy extrusions.
The anode oxidative treatment method that is applied to aluminium alloy extrusions in prior art refers to: in certain electrolytic solution, taking aluminium alloy extrusions part as anode, taking stainless steel or aluminum metal as negative electrode, in strongly-acid electrolytic solution, aluminium alloy extrusions is carried out to surface-treated process.But in prior art, each manufacturer is not identical arranging of negative electrode electric installation and anode conducting device, setting for the oxidation unit of different types of aluminium alloy extrusions is not identical yet, thereby cause surface quality uneven of the aluminium alloy extrusions occurring on market, more and more be difficult to meet human consumer's consumers demand, in addition oxidation unit arrange for the processing of electrolytic solution to be direct discharge substantially, easily to cause environmental pollution.Therefore, studying a kind of anodic oxidation device that is applicable to piping aluminium alloy extrusions is the current problem that will study.
Summary of the invention
Technical problem to be solved by this invention is: overcome deficiency of the prior art, a kind of anodic oxidation device and aluminium alloy extrusions frosting technology that is applicable to piping aluminium alloy extrusions is provided, this device conductivity is good, and the surface quality of aluminium alloy extrusions can significantly be unified and improve to oxidizing process on its basis.
The technical solution adopted for the present invention to solve the technical problems is: a kind of high-efficient aluminium alloy section bar oxidation unit, this oxidation unit comprises cell body, negative electrode electric installation, anode conducting device and electrolytic solution configured slot, the trough rim end face of described cell body has equally distributed recess, negative electrode electric installation is by recess and cell body clamping, the base plate cross section of cell body is spill, and spill central position is vertically installed with leads to electrolytic solution configured slot liquid discharge pipe;
The making material of described negative electrode electric installation is plumbous, and negative electrode electric installation is Z-type structure, and the angle of the adjacent edge composition of Z-type structure is 90 °, and the outer wall of Z-type structure front end is enclosed with insulation layer; Described anode conducting device is fixedly installed on two opposed inner walls of cell body in pairs and respectively, and anode conducting device is that the two-part that is bolted can bending structure, and the front end of anode conducting device is the cone-shaped body that diameter reduces gradually; The bottom of described electrolytic solution configured slot is inclined structure, is specially: by a lateral deviation of electrolytic solution configured slot, to a relative side, the bottom lowest part of electrolytic solution configured slot is provided with waste liquid relief outlet and leads to the pump housing of cell body.
Further, described liquid discharge pipe upper end is provided with valve, and for preventing that chemical agent from forming dead angle in groove, the inwall turning of cell body is fillet structure, and in Z-type structure, the front end of horizontal edge is connected with power cathode by wire.
Further, for improving cell body production efficiency, the logarithm of described anode conducting device is at least one pair of.
Further, the in pairs described and end that is fixedly installed on respectively the anode conducting device in two opposed inner walls of cell body is connected cell body is outside by wire.
Further, for preventing that early ageing phenomenon from appearring in cell body superheating phenomenon or cell body in process of production, the vertical range of the trough rim of described Z-type structure vertical edge and the clamping of Z-type structure is 1.5-3 times of Z-type structure vertical edge thickness, and the height of Z-type structure is less than the height of cell body inwall; Under described Z-type structure, between horizontal edge and the bottom of cell body inwall, there is space.
Further, for convenience of the waste liquid in electrolytic solution configured slot directly being discharged or the re-using of pure solution, between the bottom lowest part of described electrolytic solution configured slot and the pump housing, be provided with valve, waste liquid relief outlet is provided with valve.
A frosting technology for aluminium alloy extrusions, adopts above-mentioned high-efficient aluminium alloy section bar oxidation unit, and this frosting technology has following steps:
A. self-inspection is added
Aluminium alloy extrusions is carried out to surface examination, record same batch of each section bar surface flatness, defect, burr and aberration level, after record, the two ends of aluminium alloy extrusions are respectively installed on the anode conducting device of oxidation unit;
Further, for ensureing production safety, the every groove dress of 1 Wan An training cell body vermicelli amass as 60-70m
2for the best, Special Circumstances must not exceed 60m
2, the every groove dress of 1.2 Wan An training cell body vermicelli amass as 70-90m
2.
B. oil removing washing
Degreaser is injected to cell body, at normal temperatures aluminium alloy section surface is carried out to oil removing, the composition of described degreaser is the sulphuric acid soln of 150-200g/L, process after 2-8min with clear water wash to the pH of Surface of profile be 4-7, degreaser and washes are discharged;
Further, the greasy dirt of in particular cases looking Surface of profile is determined the treatment time.
C. sand face processing
Sand face is processed aciding or the alkaline etching method of adopting, the specific practice of aciding is: confection is injected to cell body, in the time of 35-45 DEG C, aluminium alloy section surface is processed to 5-10min, then with clear water wash to the pH of Surface of profile be 5-7, confection and washes are discharged; The pH value of described confection is 3.0-3.5, confection comprises that concentration is the etching agent of 8-10g/L and the ammonium bifluoride that F concentration is 30-40g/L, wherein, etching agent is two sour mixtures or three sour mixtures, two sour mixtures are that concentration is that the phosphoric acid of 55-65g/L and sulfuric acid that concentration is 9-12g/L obtain according to mass ratio configuration in 30: 70, and three sour mixtures are that concentration is the phosphoric acid of 55-65g/L, sulfuric acid that concentration is 9-12g/L and the concentration nitric acid that is 4-5.5g/L according to mass ratio (70-80): (15-20): (5-10) configure and obtain;
The specific practice of alkaline etching method is: alkaline etching agent is injected to cell body, aluminium alloy section surface is carried out to alkaline etching, described alkaline etching agent comprises two kinds, a kind of is that concentration is the sodium hydroxide solution of 40-65g/L and the sour sand of 20-40g/L, treatment temp is 45-55 DEG C, treatment time is 2-5min, another kind is that concentration is the sodium hydroxide solution of 40-65g/L and the alkali sand of 40-80g/L, treatment temp is 45-70 DEG C, treatment time is 8-15min, adopt above-mentioned any one alkaline etching agent process after 2-8min with clear water wash to the pH of Surface of profile be 6-8, alkaline etching agent and washes are discharged,
D. in, wash with bright dipping
Neutralization reagent is injected to cell body, in at normal temperatures aluminium alloy section surface being carried out and technique, described neutralization reagent is that concentration is the sulfuric acid of 180-200g/L or the nitric acid that concentration is 140-180g/L, process after 2-4min with clear water wash to the pH of Surface of profile be 3-5, neutralization reagent and washes are discharged;
Bright dipping reagent is injected to cell body, at normal temperatures aluminium alloy section surface is carried out to bright dipping technique, described bright dipping reagent is that concentration is the nitric acid of 200-280g/L, process after 2-4min with clear water wash to the pH of Surface of profile be 5-7, bright dipping reagent and washes are discharged;
E. anodic oxidation washing
This step is to a kind of water white film of the Surface Creation of goods, prevents the surface corrosion of material, and the thickness of rete is to adjust according to client's demand, and thickness forms the impact that is conventionally subject to current density, voltage, tank liquor concentration and temperature;
Inject the electrolyte in cell body, in the time that temperature is 20 ± 2 DEG C, aluminium alloy section surface is carried out to oxidizing process, described electrolytic solution be 130-160g/L sulphuric acid soln and≤aluminum ion of 20g/L composition, after processing with clear water wash to the pH of Surface of profile be 5-7, electrolytic solution and washes are discharged, treatment time determines according to the thickness of required oxide film, current density and formula L=IT K, wherein, L in formula is oxide film micron thickness, K is constant 0.28-0.3, and I is current density A/m
2, T is oxidation the number of minutes;
After the long-pending calculating accurately of dress vermicelli, just can try to achieve the required oxidization time of any thickness of oxidation film from above-mentioned formula; Aluminium alloy extrusions should be avoided being immersed in for a long time in tank before anodic oxidation, and maximum duration is no more than 3min, in order to avoid the acid etch Surface of profile in tank; Through anodised product, the time stopping in groove is no more than 5min, prevents from affecting the quality of oxide film; Require the high bright product of brightness, current density is selected 1-1.2A/dm
2be advisable.
F. sealing of hole washing and drying
Pore-sealing liquid is injected to cell body, in the time that temperature is 25 ± 2 DEG C, aluminium alloy section surface is carried out to hole-sealing technology, the nickel ion that described pore-sealing liquid is 0.8-1.5g/L by concentration and the fluorion of 0.3-0.65g/L form, and the pH value of pore-sealing liquid is 5.5-6.5, and the hole-sealing technology treatment time determines according to the thickness of oxide film, 1 point of general each film sealing of hole, after being disposed with clear water wash to the pH of Surface of profile be 5-7.5, pore-sealing liquid and washes are discharged, treat that aluminium alloy section surface is dry;
G. undercarriage test package
Aluminium alloy extrusions is taken off to packaging warehouse-in after record of survey from anode conducting device.
Undercarriage should be handled with care, note the distortion of anti-damage, anti-collision, apart from undercarriage 3m, what do not allow section bar touches wound sound, what length was greater than 4m processes directly can being placed on the solarization bin on place of packaging without finishing mandrel, and the product of not drying (drip-dry) is placed on the solarization bin on place; Product needed is done lower step processing, requires first to process product being placed on " chassis " of packing afterwards.
Beneficial effect: in technical scheme of the present invention, the bottom lowest part of electrolytic solution configured slot is provided with waste liquid relief outlet and leads to the setting of the pump housing of cell body, can effectively reduce the direct ER for emission rate of electrolytic solution, improves the second stage employ rate of electrolytic solution; The base plate cross section of cell body is that the bottom of spill and electrolytic solution configured slot is the setting of inclined structure, can effectively improve the drainage rate of electrolytic solution; Negative electrode electric installation, by the setting of recess and cell body clamping and insulation layer, can effectively improve the overall security of this device; Anode conducting device is fixedly installed on two opposed inner walls of cell body in pairs and respectively, anode conducting device is the setting that the two-part that is bolted can bending structure, can facilitate the installation and removal of tubular type aluminium alloy extrusions, be conducive to aluminium alloy extrusions and be oxidized in the electrolytic solution of homogeneous; The front end of anode conducting device is the setting of the cone-shaped body that reduces gradually of diameter, can reduce the contact area of anode conducting device and aluminium alloy extrusions to be oxidized, thereby effectively reduce later stage scrap rate.
Adopt the anodic oxidation device that is applicable to piping aluminium alloy extrusions of technical scheme gained of the present invention; conductivity is good, can effectively improve the consistence of piping Surface Quality of Aluminum Alloy Profiles, effectively reduces waste of raw materials; improve electrolytic solution effective rate of utilization, be applicable to large-scale promotion application.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described;
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional view in Fig. 1;
Fig. 3 is the B-B sectional view of Fig. 1;
1. cell body in figure, 11. liquid discharge pipes, 2. negative electrode electric installation, 21. insulation layers, 3. anode conducting device, 4. electrolytic solution configured slot, 41. pump housings, 42. waste liquid relief outlets.
Embodiment
The present invention is further illustrated by reference to the accompanying drawings now.The schematic diagram that these accompanying drawings are simplification only illustrates basic structure of the present invention in a schematic way, and therefore it only shows the formation relevant with the present invention.
A kind of high-efficient aluminium alloy section bar oxidation unit as shown in Figure 1, 2, 3, this anodic oxidation device comprises cell body 1, negative electrode electric installation 2, anode conducting device 3 and electrolytic solution configured slot 4, the trough rim end face of cell body 1 has equally distributed recess, negative electrode electric installation 2 is by recess and cell body 1 clamping, the base plate cross section of cell body 1 is spill, and spill central position is vertically installed with leads to electrolytic solution configured slot 4 liquid discharge pipes 11; Negative electrode electric installation 2 is Z-type structure, and the angle of the adjacent edge composition of Z-type structure is 90 °, and the outer wall of Z-type structure front end is enclosed with insulation layer 21; Described anode conducting device 3 is fixedly installed on two opposed inner walls of cell body 1 in pairs and respectively, and anode conducting device 3 can bending structure for the two-part that is bolted, and the front end of anode conducting device 3 is the cone-shaped body that diameter reduces gradually; The bottom of electrolytic solution configured slot (4) is inclined structure, is specially: by a lateral deviation of electrolytic solution configured slot 4, to a relative side, the bottom lowest part of electrolytic solution configured slot 4 is provided with waste liquid relief outlet 42 and leads to the pump housing 41 of cell body 1.
Liquid discharge pipe 11 upper ends are provided with valve, and the inwall turning of cell body 1 is fillet structure.In Z-type structure, the front end of horizontal edge is connected with power cathode by wire.The logarithm of anode conducting device 3 is three pairs, and the end that is fixedly installed in pairs and respectively the anode conducting device 3 in two opposed inner walls of cell body 1 is connected cell body 1 is outside by wire.
The vertical range of the trough rim of Z-type structure vertical edge and the clamping of Z-type structure is 1.5 times of Z-type structure vertical edge thickness, the height of Z-type structure is less than the height of cell body 1 inwall, under Z-type structure, between horizontal edge and the bottom of cell body 1 inwall, there is space, between the bottom lowest part of electrolytic solution configured slot 4 and the pump housing 41, be provided with valve, waste liquid relief outlet 42 is provided with valve, and the making material of negative electrode electric installation 3 is plumbous.
A frosting technology for aluminium alloy extrusions, adopts above-mentioned high-efficient aluminium alloy section bar oxidation unit, and this frosting technology has following steps:
A. self-inspection is added
Aluminium alloy extrusions is carried out to surface examination, record same batch of each section bar surface flatness, defect, burr and aberration level, after record, the two ends of aluminium alloy extrusions are respectively installed on the anode conducting device 3 of oxidation unit; For ensureing production safety, the every groove dress of 1 Wan An training cell body 1 vermicelli amass as 60-70m
2for the best, Special Circumstances must not exceed 60m
2, the every groove dress of 1.2 Wan An training cell body 1 vermicelli amass as 70-90m
2.
B. oil removing washing
Degreaser is injected to cell body 1, at normal temperatures aluminium alloy section surface is carried out to oil removing, the sulphuric acid soln that the composition of described degreaser is 200g/L, process after 8min with clear water wash to the pH of Surface of profile be 4-7, degreaser and washes are discharged;
C. sand face processing
Sand face is processed the alkaline etching method that adopts, specific practice is: alkaline etching agent is injected to cell body 1, aluminium alloy section surface is carried out to alkaline etching, described alkaline etching agent comprises two kinds, a kind of is that concentration is the sodium hydroxide solution of 40-65g/L and the sour sand of 20-40g/L, treatment temp is 45-55 DEG C, treatment time is 2-5min, another kind is that concentration is the sodium hydroxide solution of 40-65g/L and the alkali sand of 40-80g/L, treatment temp is 45-70 DEG C, treatment time is 8-15min, adopting above-mentioned any one alkaline etching agent to process all can, process after 8min with clear water wash to the pH of Surface of profile be 6-8, alkaline etching agent and washes are discharged,
D. in, wash with bright dipping
Neutralization reagent is injected to cell body 1, in at normal temperatures aluminium alloy section surface being carried out and technique, described neutralization reagent is that concentration is the sulfuric acid of 200g/L or the nitric acid that concentration is 180g/L, process after 4min with clear water wash to the pH of Surface of profile be 3-5, neutralization reagent and washes are discharged;
Bright dipping reagent is injected to cell body 1, at normal temperatures aluminium alloy section surface is carried out to bright dipping technique, described bright dipping reagent is that concentration is the nitric acid of 280g/L, process after 4min with clear water wash to the pH of Surface of profile be 5-7, bright dipping reagent and washes are discharged;
E. anodic oxidation washing
This step is to a kind of water white film of the Surface Creation of goods, prevents the surface corrosion of material, and the thickness of rete is to adjust according to client's demand, and thickness forms the impact that is conventionally subject to current density, voltage, tank liquor concentration and temperature; Inject the electrolyte in cell body 1, in the time that temperature is 20 ± 2 DEG C, aluminium alloy section surface is carried out to oxidizing process, the sulphuric acid soln that described electrolytic solution is 160g/L and≤aluminum ion of 20g/L composition, after processing with clear water wash to the pH of Surface of profile be 5-7, electrolytic solution and washes are discharged, treatment time determines according to the thickness of required oxide film, current density and formula L=IT K, and wherein, the L in formula is oxide film micron thickness, K is constant 0.28-0.3, and I is current density A/m
2, T is oxidation the number of minutes; After the long-pending calculating accurately of dress vermicelli, just can try to achieve the required oxidization time of any thickness of oxidation film from above-mentioned formula; Aluminium alloy extrusions should be avoided being immersed in for a long time in tank before anodic oxidation, and maximum duration is no more than 3min, in order to avoid the acid etch Surface of profile in tank; Through anodised product, the time stopping in groove is no more than 5min, prevents from affecting the quality of oxide film; Require the high bright product of brightness, current density is selected 1-1.2A/dm
2be advisable.
F. sealing of hole washing and drying
Pore-sealing liquid is injected to cell body 1, in the time that temperature is 25 ± 2 DEG C, aluminium alloy section surface is carried out to hole-sealing technology, the nickel ion that described pore-sealing liquid is 1.5g/L by concentration and the fluorion of 0.65g/L form, and the pH value of pore-sealing liquid is 5.5-6.5, and the hole-sealing technology treatment time determines according to the thickness of oxide film, 1 point of general each film sealing of hole, after being disposed with clear water wash to the pH of Surface of profile be 5-7.5, pore-sealing liquid and washes are discharged, treat that aluminium alloy section surface is dry;
G. undercarriage test package
Aluminium alloy extrusions is taken off to packaging warehouse-in after record of survey from anode conducting device 3.Undercarriage should be handled with care, note the distortion of anti-damage, anti-collision, apart from undercarriage 3m, what do not allow section bar touches wound sound, what length was greater than 4m processes directly can being placed on the solarization bin on place of packaging without finishing mandrel, and the product of not drying (drip-dry) is placed on the solarization bin on place; Product needed is done lower step processing, requires first to process product being placed on " chassis " of packing afterwards.
Above-mentioned embodiment is only explanation technical conceive of the present invention and feature; its object is to allow person skilled in the art can understand content of the present invention and be implemented; can not limit the scope of the invention with this; all equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (9)
1. a high-efficient aluminium alloy section bar oxidation unit, it is characterized in that: this oxidation unit comprises cell body (1), negative electrode electric installation (2), anode conducting device (3) and electrolytic solution configured slot (4), the trough rim end face of described cell body (1) has equally distributed recess, negative electrode electric installation (2) is by recess and cell body (1) clamping, the base plate cross section of cell body (1) is spill, and spill central position is vertically installed with leads to electrolytic solution configured slot (4) liquid discharge pipe (11);
Described negative electrode electric installation (2) is Z-type structure, and the angle of the adjacent edge composition of Z-type structure is 90 °, and the outer wall of Z-type structure front end is enclosed with insulation layer (21); Described anode conducting device (3) is fixedly installed on two opposed inner walls of cell body (1) in pairs and respectively, anode conducting device (3) can bending structure for the two-part that is bolted, and the front end of anode conducting device (3) is the cone-shaped body that diameter reduces gradually; The bottom of described electrolytic solution configured slot (4) is inclined structure, and the bottom lowest part of electrolytic solution configured slot (4) is provided with waste liquid relief outlet (42) and leads to the pump housing (41) of cell body (1).
2. high-efficient aluminium alloy section bar oxidation unit according to claim 1, is characterized in that: described liquid discharge pipe (11) upper end is provided with valve, and the inwall turning of cell body (1) is fillet structure.
3. high-efficient aluminium alloy section bar oxidation unit according to claim 1, is characterized in that: the logarithm of described anode conducting device (3) is at least one pair of.
4. high-efficient aluminium alloy section bar oxidation unit according to claim 1, is characterized in that: the in pairs described and end that is fixedly installed on respectively the anode conducting device (3) in two opposed inner walls of cell body (1) is connected cell body (1) is outside by wire.
5. high-efficient aluminium alloy section bar oxidation unit according to claim 1, is characterized in that: the vertical range of the trough rim of described Z-type structure vertical edge and the clamping of Z-type structure is 1.5-3 times of Z-type structure vertical edge thickness.
6. high-efficient aluminium alloy section bar oxidation unit according to claim 1, is characterized in that: the height of described Z-type structure is less than the height of cell body (1) inwall.
7. high-efficient aluminium alloy section bar oxidation unit according to claim 1, is characterized in that: under described Z-type structure, between horizontal edge and the bottom of cell body (1) inwall, have space.
8. high-efficient aluminium alloy section bar oxidation unit according to claim 1, it is characterized in that: between the bottom lowest part of described electrolytic solution configured slot (4) and the pump housing (41), be provided with valve, waste liquid relief outlet (42) is provided with valve.
9. a frosting technology for aluminium alloy extrusions, is characterized in that: the high-efficient aluminium alloy section bar oxidation unit described in employing claim 1-8 any one, and this frosting technology has following steps:
A. self-inspection is added
Aluminium alloy extrusions is carried out to surface examination, record same batch of each section bar surface flatness, defect, burr and aberration level, after record, the two ends of aluminium alloy extrusions are respectively installed on the anode conducting device (3) of oxidation unit;
B. oil removing washing
Degreaser is injected to cell body (1), at normal temperatures aluminium alloy section surface is carried out to oil removing, the composition of described degreaser is the sulphuric acid soln of 150-200g/L, process after 2-8min with clear water wash to the pH of Surface of profile be 4-7, degreaser and washes are discharged;
C. sand face processing
Sand face is processed aciding or the alkaline etching method of adopting, the specific practice of aciding is: confection is injected to cell body (1), in the time of 35-45 DEG C, aluminium alloy section surface is processed to 5-10min, then with clear water wash to the pH of Surface of profile be 5-7, confection and washes are discharged; The pH value of described confection is 3.0-3.5, confection comprises that concentration is the etching agent of 8-10g/L and the ammonium bifluoride that F concentration is 30-40g/L, wherein, etching agent is two sour mixtures or three sour mixtures, two sour mixtures are that concentration is that the phosphoric acid of 55-65g/L and sulfuric acid that concentration is 9-12g/L obtain according to mass ratio configuration in 30: 70, and three sour mixtures are that concentration is the phosphoric acid of 55-65g/L, sulfuric acid that concentration is 9-12g/L and the concentration nitric acid that is 4-5.5g/L according to mass ratio (70-80): (15-20): (5-10) configure and obtain;
The specific practice of alkaline etching method is: alkaline etching agent is injected to cell body (1), aluminium alloy section surface is carried out to alkaline etching, described alkaline etching agent comprises two kinds, a kind of is that concentration is the sodium hydroxide solution of 40-65g/L and the sour sand of 20-40g/L, treatment temp is 45-55 DEG C, treatment time is 2-5min, another kind is that concentration is the sodium hydroxide solution of 40-65g/L and the alkali sand of 40-80g/L, treatment temp is 45-70 DEG C, treatment time is 8-15min, adopt above-mentioned any one alkaline etching agent process after 2-8min with clear water wash to the pH of Surface of profile be 6-8, alkaline etching agent and washes are discharged,
D. in, wash with bright dipping
Neutralization reagent is injected to cell body (1), in at normal temperatures aluminium alloy section surface being carried out and technique, described neutralization reagent is that concentration is the sulfuric acid of 180-200g/L or the nitric acid that concentration is 140-180g/L, process after 2-4min with clear water wash to the pH of Surface of profile be 3-5, neutralization reagent and washes are discharged;
Bright dipping reagent is injected to cell body (1), at normal temperatures aluminium alloy section surface is carried out to bright dipping technique, described bright dipping reagent is that concentration is the nitric acid of 200-280g/L, process after 2-4min with clear water wash to the pH of Surface of profile be 5-7, bright dipping reagent and washes are discharged;
E. anodic oxidation washing
Inject the electrolyte in cell body (1), in the time that temperature is 20 ± 2 DEG C, aluminium alloy section surface is carried out to oxidizing process, described electrolytic solution be 130-160g/L sulphuric acid soln and≤aluminum ion of 20g/L composition, after processing with clear water wash to the pH of Surface of profile be 5-7, electrolytic solution and washes are discharged, treatment time determines according to the thickness of required oxide film, current density and formula L=IT K, wherein, L in formula is oxide film micron thickness, K is constant 0.28-0.3, and I is current density A/m
2, T is oxidation the number of minutes;
F. sealing of hole washing and drying
Pore-sealing liquid is injected to cell body (1), in the time that temperature is 25 ± 2 DEG C, aluminium alloy section surface is carried out to hole-sealing technology, the nickel ion that described pore-sealing liquid is 0.8-1.5g/L by concentration and the fluorion of 0.3-0.65g/L form, the pH value of pore-sealing liquid is 5.5-6.5, the hole-sealing technology treatment time determines according to the thickness of oxide film, 1 point of general each film sealing of hole, after being disposed with clear water wash to the pH of Surface of profile be 5-7.5, pore-sealing liquid and washes are discharged, treat that aluminium alloy section surface is dry;
G. undercarriage test package
Aluminium alloy extrusions is taken off to packaging warehouse-in after record of survey from anode conducting device (3).
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| CN105274545A (en) * | 2015-11-25 | 2016-01-27 | 天津航空机电有限公司 | Electroplating or chemical-plating pretreatment method of aluminum alloy and application of electroplating or chemical-plating pretreatment method |
| CN105369269A (en) * | 2015-11-20 | 2016-03-02 | 金川集团股份有限公司 | Aluminum and aluminum alloy surface cleaning agent and using method |
| CN110079848A (en) * | 2019-04-28 | 2019-08-02 | 安徽华淮新材料有限公司 | Aluminum alloy chemically coarse sand surface treatment method |
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| CN110079848A (en) * | 2019-04-28 | 2019-08-02 | 安徽华淮新材料有限公司 | Aluminum alloy chemically coarse sand surface treatment method |
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